Display panel, manufacturing method thereof and display device

Abstract

The present application relates to a display panel, a manufacturing method thereof, and a display device. The display panel includes a base substrate, a plurality of pixel structures on the base substrate, and a color resist layer on a side of the plurality of pixel structures facing away the base substrate. The color resist layer includes a plurality of color resist blocks in one-to-one correspondence with the plurality of pixel structures. Light emitted from each of the plurality of pixel structures has the same color as the color resist block corresponding thereto.

The invention claimed is: 
     
       1. A display panel comprising:
 a base substrate; 
 a plurality of pixel structures on the base substrate; and 
 a color resist layer on a side of the plurality of pixel structures facing away from the base substrate, 
 wherein the color resist layer comprises a plurality of color resist blocks in one-to-one correspondence with the plurality of pixel structures, an orthogonal projection of each color resist block of the plurality of color resist blocks on the base substrate overlaps with an orthogonal projection of a corresponding pixel structure of the plurality of pixel structures on the base substrate, 
 wherein the color resist layer further comprises a black matrix comprising a plurality of first black matrix blocks and a plurality of second black matrix blocks, each first black matrix block of the plurality of first black matrix blocks is between adjacent color resist blocks of a same color of the plurality of color resist blocks, each second black matrix block of the plurality of second black matrix blocks is between adjacent color resist blocks of different colors of the plurality of color resist blocks, the plurality of second black matrix blocks comprise a first type of second black matrix block and a second type of second black matrix block, an extension direction of the first type of second black matrix block is parallel to an extension direction of the plurality of first black matrix blocks, an extension direction of the second type of second black matrix block intersects with the extension direction of the plurality of first black matrix blocks, 
 wherein each pixel structure of the plurality of pixel structures comprises a first electrode, a plurality of electroluminescent structures and a second electrode arranged sequentially on the base substrate, the first electrode comprises a reflective conducting layer, a second conducting layer on the reflective conducting layer and an insulating layer between the second conducting layer and the reflective conducting layer, the second electrode comprises a transflective conducting layer, and the pixel structure is configured to emit light with a color consistent with a color of a corresponding color resist block of the plurality of color resist blocks. 
 
     
     
       2. The display panel according to  claim 1 , wherein the pixel structure comprises a resonant cavity, the resonant cavity includes the transflective conducting layer and the reflective conducting layer. 
     
     
       3. The display panel according to  claim 2 ,
 wherein the insulating layer comprises a via hole, the second conducting layer is electrically connected with the reflective conducting layer through the via hole in the insulating layer, the plurality of pixel structures comprise a red light pixel structure configured to emit red light, a green light pixel structure configured to emit green light and a blue light pixel structure configured to emit blue light, and 
 wherein a thickness of the insulating layer of the red light pixel structure is greater than a thickness of the insulating layer of the blue light pixel structure. 
 
     
     
       4. The display panel according to  claim 2 ,
 wherein the insulating layer comprises a via hole, the second conducting layer is electrically connected with the reflective conducting layer through the via hole in the insulating layer, the plurality of pixel structures comprise a red light pixel structure configured to emit red light, a green light pixel structure configured to emit green light and a blue light pixel structure configured to emit blue light, and 
 wherein a thickness of the insulating layer of the blue light pixel structure is greater than a thickness of the insulating layer of the red light pixel structure. 
 
     
     
       5. The display panel according to  claim 3 , wherein the insulating layer comprises inorganic material. 
     
     
       6. The display panel according to  claim 5 , wherein the insulating layer comprises silicon oxide. 
     
     
       7. The display panel according to  claim 1 , wherein the first electrode further comprises a first conducting layer between the base substrate and the reflective conducting layer, and the second conducting layer is on a side of the reflective conducting layer facing away from the base substrate. 
     
     
       8. The display panel according to  claim 7 , wherein at least one of the first conducting layer and the second conducting layer comprise indium tin oxide. 
     
     
       9. The display panel according to  claim 1 , wherein the display panel further comprises a thin film encapsulation layer on a side of the plurality of pixel structures facing away from the base substrate. 
     
     
       10. The display panel according to  claim 1 , wherein the pixel structure comprises a plurality of OLEDs connected in series, the plurality of OLEDs comprise the plurality of electroluminescent structures. 
     
     
       11. The display panel according to  claim 1 ,
 wherein the plurality of electroluminescent structures comprise a first electroluminescent structure and a second electroluminescent structure arranged on the base substrate in sequence, 
 wherein the pixel structure further comprises a first electrical connection layer between the first electroluminescent structure and the second electroluminescent structure to connect the first electroluminescent structure with the second electroluminescent structure, and 
 wherein the first electroluminescent structure comprises a red light emitting layer and a green light emitting layer, and the second electroluminescent structure comprises a blue light emitting layer. 
 
     
     
       12. The display panel according to  claim 1 ,
 wherein the plurality of electroluminescent structures comprise a third electroluminescent structure, a fourth electroluminescent structure and a second electroluminescent structure arranged on the base substrate in sequence, the pixel structure further comprises a second electrical connection layer between the third electroluminescent structure and the fourth electroluminescent structure, and a third electrical connection layer between the fourth electroluminescent structure and the second electroluminescent structure, and 
 wherein the third electroluminescent structure comprises a red light emitting layer, the fourth electroluminescent structure comprises a green light emitting layer, and the second electroluminescent structure comprises a blue light emitting layer, the third electroluminescent structure is connected with the fourth electroluminescent structure by the second electrical connection layer, the fourth electroluminescent structure is connected with the second electroluminescent structure by the third electrical connection layer. 
 
     
     
       13. The display panel according to  claim 10 ,
 wherein the reflective conducting layer and the transflective conducting layer form a resonant cavity, 
 wherein a cavity length of the resonant cavity comprises a distance between the reflective conducting layer and the transflective conducting layer, and 
 wherein a wavelength of light emitted from the pixel structure is positively correlated with the cavity length of the resonant cavity of the pixel structure. 
 
     
     
       14. The display panel according to  claim 13 ,
 wherein the first electrode further comprises a first conducting layer between the base substrate and the reflective conducting layer, and 
 wherein the insulating layer comprises a via hole, the second conducting layer is electrically connected with the reflective conducting layer through the via hole in the insulating layer, the wavelength of light emitted from the pixel structure is positively correlated with a thickness of the insulating layer of the pixel structure. 
 
     
     
       15. The display panel according to  claim 13 ,
 wherein the first electrode further comprises a first conducting layer between the base substrate and the reflective conducting layer, the second conducting layer is on a side of the reflective conducting layer facing away from the base substrate, and 
 wherein the wavelength of light emitted from the pixel structure is positively correlated with a thickness of the second conducting layer of the pixel structure. 
 
     
     
       16. The display panel according to  claim 13 ,
 wherein the pixel structure further comprises a functional film between the first electrode and the second electrode, 
 wherein the functional film comprises at least one selected from a group consisting of an electron injection layer, an electron transport layer, a hole injection layer and a hole transport layer, and 
 wherein a wavelength of light emitted from the pixel structure is positively correlated with a thickness of the functional film in the pixel structure. 
 
     
     
       17. The display panel according to  claim 13 ,
 wherein the cavity length d of the resonant cavity of the pixel structure satisfies 
 
       
         
           
             
               
                 d 
                 = 
                 
                   
                     k 
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     λ 
                   
                   
                     2 
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     n 
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     cos 
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     θ 
                   
                 
               
               , 
             
           
         
          and 
         wherein, k is a coefficient being positive integer, λ is the wavelength of light emitted from the pixel structure, n is an average refractive index of a medium in the resonant cavity, and θ is a reflective angle of light emitted from the pixel structure on the reflective conducting layer. 
       
     
     
       18. The display panel according to  claim 17 ,
 wherein the plurality of pixel structures comprises a red light pixel structure configured to emit red light, a green light pixel structure configured to emit green light and a blue light pixel structure configured to emit blue light, and 
 wherein the coefficient k for the cavity length of the resonant cavity of each of the red light pixel structure, the green light pixel structure and the blue light pixel structure is i, i≥1. 
 
     
     
       19. The display panel according to  claim 17 ,
 wherein the plurality of pixel structures comprises a red light pixel structure configured to emit red light, a green light pixel structure configured to emit green light and a blue light pixel structure configured to emit blue light, and 
 wherein the coefficient k for the cavity length of the resonant cavity of each of the red light pixel structure and the green light pixel structure is j, the coefficient k for the cavity length of the resonant cavity of the blue light pixel structure is j+1, j≥1. 
 
     
     
       20. A display device, comprising the display panel according to  claim 1 .